Organic sulphur compound and composition thereof



Patented Sept. 30, 1941 oaomc sun-mm com'ouun m courosrrron manor Vanderveer, Voorhees,. Hammond,

8W 0!] Compa motion of Indiana ny, Chicago, Ill.,a cor- .mam'

No Drawing. Application June 11, 1938,

Serial N0. 213,187

11 0mm. (or. 260-125) I This invention relates to a new article of manuiacture and. the method of! preparing, the

samei.

The new: of manufacture is prepared by reacting: a polysuiphide with an olefin derived wu-m-i-presenceof amercaptan. The

olefin derived compound is preferably one conthe group Cal-Ia combined with the equivalent of two monovalent negative radicals, suchas the halogen derivatives of the homologs of the ethylene series, for example,amylene dichloride, butylene dichloride, propylene dichloride. ethylene dichloride, ethylene dibromide, propylene dibromide, methylene. di-iodide, and methylene dichloride. Other olefinic compounds, such as the olefin sulphates, the olefin acetates and the .olefin oxides, e. g. ethylene oxide may also be used, although the alkylene dihalides are preferred. r

The polysulphides employed in the reaction are preferably the polysulphides of. the alkali metals. the alkaline earth metals and ammonia which are hereinafter referred sulphides.

Although mercaptans in general may be used in the'reaction I prefer to employ the alkyl mercaptans and preferably those alkyl mercaptans having more than three carbon atoms in the alkyl radical. Examples of the alkyl mercaptans which I prefer to use are butylmercaptans, amyl mercaptans, hexyl mercaptans, octyl meroaptans. cetyl mercaptans, lauryl mercaptans and the like. I may also use cyclic compounds such as cyclohexyl mercaptan.

The product of the present invention is obtained by reacting from about 35% to about 50% of the polysulphide with from about 25% to about 35% of an olefin dihalide in the presence of from about 15% to about 50% of an alkyl mercaptan at a temperature of from about 140 F. to about 190 F. and even as high as about 375 F. ii the, reaction is carried out in a pressure vessel with a reaction time of from about 1 to about hours. Any excess or merc ptan may be recovered by suitable means.

The method of carrying out the invention'is exemplified by the following illustrations which are intended merely to illustrate the invention and not in any way to limit the scope thereof.

Erample I About 54 grams ofsodium tetrasulphide were dissolved in sufllcient water to obtain a solution having substantially the same specific gravity as a mixture of about 37 grams of ethylene dichlofrom this reaction after to as the "alkali polynot had a sulphur content of ride.- and. about 1'1 grams of amyl mercaptan.

The. mixture otpolysulphide solution, mercaptan and ethylene dichloride was digested at a temperatm'e of about 160 F. ior'about 2 hours in a vessel having a reflux condenser. The reaction mass was then stripped with CO: at about and a very thick liquid which was not very soluble in oil was obtained.

Example I! ture was then heated together in a flask provided with a reflux condenser v at a temperature of about 160 F. for about 6 ho s. The product obtained being stripp d with CO: at a temperature of about 300 F. to about 400 F. was an oily substance of medium viscosity and soluble in oil. The product had a sulphur content of about 38%.

Example III Example 1v A mixture comprisins a water solution of about 69 grams of sodium penta sulphide, about 37 grams of. ethylene dichloride and about grams of amyl mercaptans was heated at a temperature of about .160 F. under a reflux condenser for about 4 hours. polysuiphide was'dissolved in sumcient water to obtain a solution approaching the same specific gravity as the mixture of ethylene dichloride and" mercaptan. The product obtained after stripping as in the foregoing examples, was an oily substance of medium viscosity and soluble to the extent of about 3% in a mineral oil. This prodabout I have discovered that the products obtained by the above described reactions are valuable addition agents in lubricants, electrical insulating oils, Diesel fuels and other mineral oil products, including greases and wax, products. For

example,'3% of the reaction product obtained in.

Example II raised the cetane number of a reg- As in the previous examples the as broadly as the prior art will permit.

'per'centoi thereaction product obtained. in Example increased the cetane number of a Diesel fuel from 3'7 to 46 while 2% raised the cetane number from 3'! to 44. Upon the addition of 3% of the reaction'product obtained in Example IV the cetane number of a Diesel fuel was also raised from 37 to 46.

In addition to the effectiveness of these reaction products to improve Diesel fuels. I have discovered that the addition of from about 1% to about 10% of the reaction products to lubricants is effective in increasing the extreme pressure characteristics of such lubricants. For excompound as described in claim lin which X-is a halogen and y'is- 2.

, 3. The method of preparing an organic sulphur compound as described in claim 1 in which the mercaptan is an alkyl mercaptan having at least 3 carbon atoms in the alkyl radical.

4. The method of preparing an organic sulphur compound comprising reacting a sodium polysulphide; with a-mixture of an alkyl mercaptan i and an allrylene'dihalide.

ample an S. A. E. No. oil containing 5% of the reaction product obtained in Example IV passed the S. A. E. extreme pressure test at 600 pounds and 1000 R. P. M. The oil alone failed atlfi pounds and 10008.. P. M. Relatively small amounts, for example 0.001 to 0.05% o! these reaction products are also effective in inhibiting the oxidation of mineral oil products.

While I have described my invention in connection with certain preferred embodiments.

thereof, I do not intend to-limit the. invention thereto except insofar as the same is defined by the appended claims which should be interpreted I claim: l. The methodot preparing an organic sulphur compound comprising reacting an alkali polysulphide with a mixture of .a mercaptan and a compound of the iormula Cal-lax in which n is a whole number, X is a negative radical and y is an-integer less than 3. Y

2. The method ofpreparing'an' organic sulphur 5. The method of preparing an organic sulphur compound as described in claim 4 in which the sodium polysulphide is sodium tetrasulphida.

6. The method of preparing an organic sulphur compound as described in claim 4 in which the sodium'polysulphidefis sodium penta sulphide.

"I, The method o f preparing an organic sulphur compound comprising reacting sodium tetrasulphide with a mixture of amyl mercaptan and ethylene dichloride.

8. An organic sulphur compound obtained by the method described in claim 1.

9. An organic sulphur compoundobtained by the method described in claim '7.

10. As a new composition of matter an organic" p r ompound obtained ,by v reacting alkali p yslllphide with a mixture of a mercaptan and a compound of the formula cnnznxy in which n is a whole 0 number, X is a: negative radical and y is an integer less than 3.

11. As a new composition of matter an organic sulphur compound obtained by reacting sodium polysulphide with a mixture of an alkyl mercaptan andan alkylene dihalide.

- VANDERVEER VQORHEES. 

